4eadb91a64
- Added rate limiting for outbound email sends to prevent abuse, implemented in `internal/api/mail/sendguard`. - Introduced idempotency key support for email sending to avoid duplicate submissions. - Enhanced attachment handling with new limits and validation in `internal/api/mail/limits`. - Updated outbox processing to include retry logic and circuit breaker for SMTP failures. - Improved HTML sanitization for email content to enhance security. - Added unit tests for new features, ensuring robust functionality and error handling. - Updated configuration options in `.env.example` for new mail settings.
29 lines
571 B
Go
29 lines
571 B
Go
package smtp
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import "time"
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const (
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DefaultMaxOutboxRetries = 8
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maxRetryDelay = time.Hour
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baseRetryDelay = 30 * time.Second
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)
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// OutboxRetryDelay returns exponential backoff before the next send attempt.
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func OutboxRetryDelay(retryCount int) time.Duration {
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if retryCount <= 0 {
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return baseRetryDelay
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}
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delay := baseRetryDelay
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for i := 0; i < retryCount && delay < maxRetryDelay; i++ {
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if delay > maxRetryDelay/2 {
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delay = maxRetryDelay
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break
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}
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delay *= 2
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}
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if delay > maxRetryDelay {
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return maxRetryDelay
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}
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return delay
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}
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